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• Reference: 2014/5111
• Question by: Stephen Knight
• Meeting date: 17 December 2014

Following your recent (if reluctant) acceptance of Kings College London data showing that Oxford Street has experienced the highest known concentration of nitrogen dioxide air pollution recorded anywhere in the world - confirmed in an exchange of letters with the Environment Audit Committee (EAC) - will you agree to study carefully new research conducted by the Royal Brompton and Harefield NHS Foundation Trust which has shown that just two hours' exposure to Oxford Street air could damage arteries and cause respiratory problems?

• Reference: 2014/5133
• Question by: Stephen Knight
• Meeting date: 17 December 2014

In the light of Mayor of Paris Anne Hidalgo's recent announcement that she intends to ban diesel vehicles from the french capital by 2020, will you make a similarly bold move to tackle London's dangerous levels of air pollution?

• Reference: 2014/5136
• Question by: Stephen Knight
• Meeting date: 17 December 2014

Further to the publication of the Health Impact Assessment (HIA) of your proposed Ultra Low Emission Zone (ULEZ) – which includes an updated estimate of the number of hospital admissions and life years lost (LYL) due to air pollution in London – can you confirm the latest estimated number of premature deaths per annum attributable to air pollution (including nitrogen dioxide (NO2)) in London?

• Reference: 2014/5137
• Question by: Stephen Knight
• Meeting date: 17 December 2014

Do you accept that following the introduction of a new Ultra Low Emission Discount (ULED) on 1 July 2013 – which provides a single 100% discount on the Congestion Charge for all electric vehicles and for ultra low emission cars and vans – the principle of differentially charging vehicles based on their tailpipe emissions already exists within the Congestion Charge zone?

• Reference: 2014/4279
• Question by: Stephen Knight
• Meeting date: 19 November 2014

Given road transport is one of the biggest sources of air pollution in London, would you support the introduction of a 'traffic light' rating system informing consumers of the exhaust emissions of all new vehicles (including particulate matter (PM) and nitrogen dioxide (NO2) in addition to carbon dioxide (CO2))?

• Reference: 2014/4284
• Question by: Stephen Knight
• Meeting date: 19 November 2014

Was it appropriate for your Environment Advisor to question the rigour of the widely respected Environmental Research Group (ERG) at King's College London with regard to the statement made by their Principal Air Quality Scientist that Oxford Street has, to his knowledge, the highest concentrations of nitrogen dioxide (NO2) recorded by any roadside air pollution monitor anywhere in the world?

• Reference: 2014/4285
• Question by: Stephen Knight
• Meeting date: 19 November 2014

Given your statutory duty to "promote improvements in the health of persons in Greater London" when exercising any of the Authority's principal purposes, including promoting the improvements of the Environment in Greater London, do you now regret tweeting comments at 4:56am on 16 July 2014 in which you dismissed scientific evidence from King's College London showing that Oxford street has the world's worst recorded concentrations of nitrogen dioxide as "B*ll*cks"?

• Reference: 2014/3595
• Question by: Stephen Knight
• Meeting date: 22 October 2014

Do you accept that the average annual level of nitrogen dioxide (NO2) recorded on Oxford Street is higher than that recorded by any other single monitoring station in any of the cities you included in your recent comparison of global air quality?

• Reference: 2014/3602
• Question by: Stephen Knight
• Meeting date: 22 October 2014

How many Penalty Charge Notices (PCNs) were issued to vehicles seen within the LEZ which did not meet the Phase 3 and Phase 4 emissions standards in 2013?

• Reference: 2014/3603
• Question by: Stephen Knight
• Meeting date: 22 October 2014

Further to receiving your 'Air Quality' prize at the C40 Siemens City Climate Leadership Awards, can you confirm how many zero emission capable taxis are currently operating on London's streets?